This has happened twice so far, upon breaking a block, the game will sometimes crash. The first time around, it even threw an unreported exception; this time, it's reported:
latest.log

Versions are probably evident from that log, but otherwise:

• Fabric 1.14.2 Pre-Release 2+build.5
• Fabric Loader 0.4.7+build.147
• Fabric API 0.3.0-pre+build.165
• Canvas 0.6.50

Thank you for the crash log. Very helpful. Somehow the cached world data for chunk rebuilds is leaking into block breaking. Will fix.

Update: code was running in the right context, just not handling nulls adequately.